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Extend the UDP message sender Cookbook with 8266 example #3924

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Extend the UDP message sender Cookbook with 8266 example #3924

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20 changes: 17 additions & 3 deletions cookbook/lambda_magic.rst
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Expand Up @@ -61,13 +61,27 @@ You can send such UDP commands from ESPHome using a Lambda in a script.

.. code-block:: yaml

esphome:
...
includes: # only needed in case of ESP8266
- WiFiUdp.h

script:
- id: send_udp
parameters:
msg: string
host: string
port: int
then:
# in case of ESP8266:
- lambda: |-
WiFiUDP Udp;
Udp.beginPacket(host.c_str(), port);
Udp.write(msg.c_str());
Udp.endPacket();
ESP_LOGD("lambda", "Sent %s to %s:%d", msg.c_str(), host.c_str(), port);

# in case of ESP32:
- lambda: |-
int sock = ::socket(AF_INET, SOCK_DGRAM, 0);
struct sockaddr_in destination, source;
Expand All @@ -76,15 +90,15 @@ You can send such UDP commands from ESPHome using a Lambda in a script.
destination.sin_port = htons(port);
destination.sin_addr.s_addr = inet_addr(host.c_str());

// you can remove the next 4 lines if you don't want to set the source port for outgoing packets
// you can remove the next 4 lines if you don't need to set the source port for outgoing packets
source.sin_family = AF_INET;
source.sin_addr.s_addr = htonl(INADDR_ANY);
source.sin_port = htons(64998); // the source port number
bind(sock, (struct sockaddr*)&source, sizeof(source));

int n_bytes = ::sendto(sock, msg.c_str(), msg.length(), 0, reinterpret_cast<sockaddr*>(&destination), sizeof(destination));
ESP_LOGD("lambda", "Sent %s to %s:%d in %d bytes", msg.c_str(), host.c_str(), port, n_bytes);
::close(sock);
ESP_LOGD("lambda", "Sent %s to %s:%d in %d bytes", msg.c_str(), host.c_str(), port, n_bytes);

button:
- platform: template
Expand All @@ -97,7 +111,7 @@ You can send such UDP commands from ESPHome using a Lambda in a script.
host: "192.168.1.10"
port: 5000

Tested on both `arduino` and `esp-idf` platforms.
Tested on ESP32 ``arduino`` and ``esp-idf`` platforms. In case of ESP8266 get ``WiFiUdp.h`` from `here <https://github.com/esp8266/Arduino/blob/master/libraries/ESP8266WiFi/src/WiFiUdp.h>`__ and place it in your configuration directory.

.. _lambda_magic_uart_text_sensor:

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